Village sewer, countryside septic
The City of Sebastopol is on sewer, and several West County villages have small sewer districts serving their centers, including Graton, Occidental, Forestville, and the Russian River area around Guerneville. Step outside those centers, onto Bodega Highway, the roads toward Bloomfield and Freestone, the hills above Forestville, or the canyons around Occidental, and septic is the rule. Septic permits in unincorporated West County go through Permit Sonoma.
Redwood canyons and steep lots
Around Occidental, Camp Meeker, and the hills above Forestville, many homes sit on steep, shaded lots under redwoods. These sites tend to stay wet through the winter, have limited flat ground for a leach field, and have roots everywhere. Common problems include root intrusion in lines and trenches, fields that saturate after storms, and old tanks on lots where access for a pump truck is hard. Where a conventional field won't work, systems often use pumps and engineered designs. See mound, sand filter, and pump systems.
Orchards, acreage, and the Laguna
The orchard and vineyard land around Sebastopol and Graton varies a lot. Some soils drain well, while clay pockets and the low ground toward the Laguna de Santa Rosa can stay wet through the winter. Acreage properties often have a main house, a second unit, and outbuildings, sometimes on one system that grew without a permit. A careful pre-purchase inspection and a records check sort out what is connected and whether the system is sized for it.
Creeks, the Russian River, and setbacks
West County is laced with salmon-bearing creeks that drain to the Russian River, and setbacks from creeks and wells often shape where a replacement field can go. Regional water-quality rules aimed at reducing bacteria in the Russian River watershed can add requirements for some systems near the river and its tributaries. Your contractor or Permit Sonoma can tell you whether your parcel is affected.
Repair or replacement in Sonoma County
Permit Sonoma treats replacing up to 25 percent of a leach field, measured cumulatively by linear footage, as a repair. Anything more is a replacement that has to meet current standards. Adding an ADU or bedrooms triggers a septic review. See leach field repair and ADU septic reviews.
Septic problems or an inspection deadline in West County? Call (707) 867-1221 or request an inspection or estimate from a local septic contractor.
Septic services in Sebastopol, Forestville & Occidental
- Home Sale & Short-Term Rental Inspections → Pre-purchase inspections during escrow, line camera checks, and the inspection Marin County requires for short-term rental licenses.
- Leach Field Repair & Replacement → Diagnosis and repair of saturated or failing leach fields, distribution boxes, root intrusion, and crushed lines.
- Septic Tank Replacement, Baffles & Risers → Replacing failing concrete, steel, and redwood tanks, repairing baffles and effluent filters, and adding risers to grade.
- Mound, Sand Filter & Pump Systems → Troubleshooting and repair for mound systems, sand filters, pressure-dosed systems, pumps, floats, and high-water alarms.
- ADU & Remodel Septic Reviews → Getting an existing system evaluated and documented when an ADU, bedroom, or remodel triggers a county septic review.
Frequently asked questions
Which West County towns have sewer?
The City of Sebastopol has sewer, and several villages have small sewer districts serving their centers, including Graton, Occidental, Forestville, and the Russian River area around Guerneville. The hills, orchards, and rural roads around them are mostly on septic. County records will confirm what a specific parcel has.
Do Russian River properties have extra septic requirements?
They can. Regional water-quality rules aimed at reducing bacteria in the Russian River and its tributaries can affect septic systems near the river and its creeks. Requirements depend on the parcel’s location, so ask your contractor or Permit Sonoma whether they apply to your property.
My West County lot is steep and wooded. What kind of septic system will work?
It depends on soil depth, slope, groundwater, and setbacks from creeks and wells. Steep, shallow, or wet sites often need a pumped or engineered system rather than a conventional gravity leach field. A site evaluation tells you what the county will accept.
Who handles septic permits in West County?
Permit Sonoma handles septic permits for unincorporated Sonoma County, including the rural land around Sebastopol, Forestville, Occidental, Graton, and Bodega.
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